Two-cycle engine.



UNITED STATES PATENT oEEoE.

KARL KUTzBAcH, or DRESDEN, GERMANY, A-ssIGNoR. To MASCHIN'ENFABRIK AUGsBURG-NRNEERG'A. G., or NUREMBERG, GERMANY.

To ali whoml itmda/conform.g

1eit knownthat l", Kani. KUTzBAoH, a subject of the King'of Saxony, and residing:r at No. 24 Lebigst-rasse, Dresden, in the Kingdom of Saxony and the German Empire, have invented new and useful Improvements in '.lwo-Cycle Engines. of which the following.:l is a specification,

My invention relates more esl'iecially to do-uhle-at-.ting two-cycle engines provided with scavenging and' exhaust slots so arranged that after the closing of the exhaust slots compre 'ed air is forced through the scavenging .slots into I the cylinder. 'lhe scavenging slots are preferably arranged in two parallel rows and so positioned that the. exhaust; .slots extending in the axial direction of lthe .vlinder lie between them, The two rows ol' `these 'scavenging/g slots are con? trollcd by a valve in such a way that as the piston moves 'forward the row of scavenging slots; first uncoi'ered h y the piston still remains closed so 'that no compressed air can enter through these scavenging slots. 'hcn on the further forward movement of the piston the exhaust. slots are uncovered and` the exhaust of the gases licgins, the second ro-w offscaw-.ngginy slots is also uncovered and the scavenging of the cylinder now be- `s (ins` Upon the rerersl of the increment of the piston also the previously uncovered but still closed row of 'scavenging Slotsl is opened, Vand as these slots are covered again hy the piston. latelfthan the exhaust slots, compressed air can continue to flow.' into the cylinder, even after the exhaust slots have heen closed.

lu the accompanying: drawing Figure 1 is a cel'itral longitudinal seciion through one end of a jacketed engine cylinder and a sectioirthrrmgha portion of the air supply pipe slimrii'ig the ariangcnient of the valve; Vig. is a section through a pori-ion of the air suppljVY pipe showing a different lcind oi valve.

u is the cylinder jacket, 7'; the piston, and c are the imhaust slots extendingr in the axial direction of the. cylinder.

The two rows of scavenging slots are l marked l and ,f respectively, and they are l connecter! with a'pipo through which. compressori air niav he supplied to said scavenging slots. t the junction of the said pipe and the pai-rages leading! to ll'u: scavenging l slots a controlling nienilier is provided l Specification of Letters Patent.

Application ined Novgmneriz, isis;

Serial No, 800,477.

which, according; to Iig'.v 1 of the drawing,

cops-ists of a rotaryvalve i and controls the' supply of con'ipressed air. tojboth rows d i and f. 'Ille corresoornr'ling positions of thel vali-'e 1l and the piston I! vare;indicated 'markingl the` centerllines offtheseeleinents' with thesatne Roina'ndrs, 1,1411; IIL IV.A

Patenggedot, 2o, 1 i1 4.

'lhe operation is as follows: lVheirthe l' pisthn I; mores from the left'inI"ig'.' 4v11:0 the right and approacl dead 'center -pof sition7 the scavenging" 'ts dlrave justbeen uncovere Atthi'slni 5 holifteverjhey are still closedagain ,tliepipe `hy the ralve i, as `seen in `-!"'i; r l. Duringhefarf ther movement` of' 'the piston, toiii'aid the right, the exhaiistfvslots c arefopenedand the exhaust begins. 'Iherenpon-also the scavenging .slotsjf are uncovered, and Vas these slots are open toward the pipe g conipressed air can enter through the slots f into the cylinder. iVhen the lpiston' l; has reached itsy dead centerjpositiorn, as shown in Fig. L the valve z moi ed vtoV gradually open theslots Il. lhiring'fthe 'rctninmove nient ol the .'piston .from therigrlitinulfig;.1

towa rd the left, 'the cylinder-is seavcnged, byv

the tafn'ipressed air enter ng through the slots f, and'irhcn these slots are. covered by llie moving piston l; the scavenging :is`A

continued hy the compre ed airentering through the slots (lt anderen after the exhaust slots (ll'iaie heen elosedby'theppiston (l, compressed air will still continue to flow in through the slots (l. Y' A's thepiston moves farther toward the left andl approaches its moves farther toward the left of Fig. l the exhaust slots l: ar(l opened and the exhaust begins, and after the piston has uncovered the 4slots l con'ipressed air `will flow into the cylinder throiigh these slots. When the piston L has reached its left Side dead Centex' position the valve 'i has moved to a position where also the slots f are opened toward the pipe g through which compressed air llO continues to flow While the piston b moves again from the left in Fig. 1 toward the right. Thus it will be seen that the two rows of scavengingslots d and fvexchanve their functions in relation to the two en s of the cylinder, inasmuch as during the movement of the piston in .one direction compressed air first-entersv into the cylinder' through the scavenging s lots-v f and continues to fiow into the cylinder throu h the scavenging slots d, and v'ice versa. Vn the practical application the valve i., of coursc,

- will have a slight lead over the piston, so thugivhen the piston vhas reached itsdeud center position, the slots d and f'respectively are Aalready open toward the pipe g so that compressed yail.' 'can' begin to flow through seid slots into the cylinder. '4

4In Fi 2.a slight modification is shown, inasmuc as in lieu of the rotaryvelve, z', a piston valve s is used, but the operation is tlefsame'as the one above described.

I claim as my invention:

vided with two rows of scavenging slots und exhaust slotsI of a pi e adapted to supply compressed air to sai rows of scavengmg slots, and a. valve arranged at the junction of` said pipe and the passaes leading to said two rows of scavenging s ots so as to control the supply of compressed air to Aseid slotstin such timed relation to the movements of the piston that the scavenging of the cylinder 1s always beguigthrough one row of slots and continued throu hy the other row of slots for each side of tie cylinder. i

In testimony two witnesses. KARL KUTZBACH. Witnesses:

PAUL Anims, CLA-'inn SIMON.

y whereof I .ilix .ny signuture in presence of 

